Don't know if you saw the post TheRambler put up a bit back. While I know its not quite what your looking for, it sure could brighten up a morning.

TheRambler said:

I use, recommend, and really like: Silly feet, almost every grocery store/walmart/target etc i have ever been in has them. They are silicon muffin cups that have feet. Work like a champ for steam baking and clean super easily. Just fill pot with water to cover the feet, put on lid and steam bake away.